TM 11-351 Telegraph Sets TG-5, TG-5-A, And TG-5-B 1945-06-15.
"a. Characteristics. Telegraph Set TG-5-(*) is a portable, open-circuit, field set designed for telegraph communication over short lines. The set may be used on ground return circuits obtained by simplexing a telephone circuit, or on other ground return or metallic circuits. The range of the equipment will vary with the type of line wire used, the condition of the wire, whether the wire is wet or dry, and whether the wire is on the ground or in the air. The telegraph set will operate satisfactorily over field wire circuits of any length likely to be encountered within divisions or subordinate units, provided the lines are well constructed.
b. Nomenclature. Telegraph Sets TG-5, TG-5-A, and TG-5-B are referred to in this manual as Telegraph Set TG-5-(*). Such nomenclature refers to any one or all of the above three models. Similarly, Relay BK-7-(*) refers to Relays BK-7, BK-7-A, and BK-7-B; Case CS-49-(*) refers to Cases CS-49 and CS-49-A; Key J-41-(*) refers to Keys J-41 and J-41-A; Interrupter BZ-7-(*) refers to Interrupters BZ-7-A, BZ-7-C, BZ-7-J, and BZ-7-N; and Interrupter BZ-5-(*) refers to Interrupters BZ-5 and BZ-5-G."
Digitized by Google Books.
"Supersedes TM 11-351, 22 September 1941, including C 1, 23 January 1942, C2, 22 July 1943; TB 11-351-1, 23 June 1944, and TB 11-351-2, 4 November 1944."